Answer:
The placenta is a unique vascular organ that receives blood supplies from both the maternal and the fetal systems and thus has two separate circulatory systems for blood: (1) the maternal-placental (uteroplacental) blood circulation, and (2) the fetal-placental (fetoplacental) blood circulation. The uteroplacental circulation starts with the maternal blood flow into the intervillous space through decidual spiral arteries. Exchange of oxygen and nutrients take place as the maternal blood flows around terminal villi in the intervillous space. The in-flowing maternal arterial blood pushes deoxygenated blood into the endometrial and then uterine veins back to the maternal circulation. The fetal-placental circulation allows the umbilical arteries
Explanation:
It's A, because it's always important to drink water. If you think about it, all the other answers seem invalid.
Answer:
A gene is a stretch of DNA that helps to control the development and function of all organs and working systems in the body.
Genes are passed from parent to offspring; the combination of these genes affects all aspects of the human body, from eye and hair color to how well the liver can process toxins.
Answer: E) Emesis from irritation of the stomach.
Explanation:
The gastroesophageal reflux disease, is a disorder of digestive system which affects the esophageal sphincter. Many people suffer from heartburn or acid indigestion caused by this disease. The overweight and pregnant individuals suffer from this disease.
In normal process of digestion, the esophageal sphincter opens to allow food to pass into the stomach and close so as to prevent food and acidic juices from stomach from flowing back to the esophagus. This disease makes the esophagus sphincter weak , that causes the stomach's contents to move up into the esophagus, this may result in vomiting. The acids in the stomach may cause ulcers.
Answer:
Additionally, fish, aquatic plants, and other organisms living in and around the reef would be considered biotic factors. Abiotic factors of a coral reef would include the water surrounding the reef, rocks, pebbles, or sand, and the calcium carbonate "skeleton" of the coral.
Explanation:
